When defining the connection details in the development mode, you are allow to build the Authorization and Access Token URL with additional parameters via the “Add Authorization Parameter” and “Add Access Token Parameter” section:

There is no way to extend the additional parameters portion as of today.

An alternative approach is to consider building the parameters directly through the “Authorization Token URL” and “Access Token URL” directly instead.

For example: ${the_authorization_url}?response_type=code&resource=……

In this case, you can then overwrite the parameters through the “OAuth2 Authorization Token URL” and “OAuth2 Access Token URL” in the extension.

This is something to be considered when you are planning to extend the OAuth 2 details for a connector.